Improvement in let-off mechanism for looms



tntrd gittata MIGAJAH BURLEIGH, orr sont:Rswoarn,l NEW, HAMPSHIRE.

Letters Patent No. 106,543, lated August 23, IST.

IMPROVEMENT IN v1'.'ETOII.".`E MECHANISM P OR LOOMS.

The Schedulereferrd to in these Letters Patentv and making part of the'same.

To all persons to whom these presents muy come Be itknown that I, MICAJAH C.' BURLEIGH, of Somersworth, of the county'of Stratford, ot' the State of New Hampshire, have made a new and useful. invention, having reference to Looms for fearing Cloth; and 1 do hereby declare t-he saine to be fully described in the following specification, and represented inthe accompanying drawing. Y

In carrying out my invention l combine, with a whip-roll and a warp-delivery mechanism applied thereto or to the loonua mechanism, as hereinafter described, to operate to so control the action of the warp-delivery mechanism as to cause it to operate and deliver warp only during the hrmation of the shed of the ,-n'alps, or while such is formed.

At any time while the auxiliary mechanism is in operation, it will cease to operate as soon as a sufiiciency of warp may haverbeen delivered to admit of the whip-roll returning to its normal or rearmost po- Sition.

This auxiliary mechanism may be viewed as a governor to yarn-delivery mechanism.

Of 4the drawing above mentioned Figure 1 denotes a top view;

Figure 2, a side elevation; and- Figure 3, a. rear-end -view of a loom-frame and its warp-delivery mechanism, with my invention applied thereto.

In such drawing- A denotes the said frame.

B, the lay. Y

C, the warp-beam.

I), the cloth-beam, and

E, the whip-roll or roller, the latter being supported by a lever', a, and an arm, (1, extending from a shaft, c, constituting the fulcrum of 4 the lever, and arranged in the upper part of the loom-frame.

A spring, (Z, affixed to the lower arm of the level' a and to the loom-frame, serves to return the whip-roll to its rearmostor normal position.

The warps are shown at W Wand the harnesses at H H', the harness-heddles at I I', and their tappets at K K.

The warp-delivery mechanism, exclusive of the said spring, consists of a gear, e, a pinion, f, a shaft, g, two ratchets, h i, a draw-pawl, k, a lever, m,.a spring, a, a slider, o, a catch-pawl, p, a rack,- q, and a lever, r, the latter being connected with the lay by means ofalink or connecting-rod, s, the whole being as shown and represented iu the drawing.

`lhe lever r may be connected with any other suitable part of the loom which will impart to it its proper motions.

The gear Ae islixed on the shaft of the warp-beam or roller O. The pinion f engages with the gear e.

ratchet I1, ill-order t-o arrest the rotary motion of it and its shaft when the lay is in the act of beating a filling-threadagainst the woven cloth.

The slidero is pivoted tothe lower arm of the lever m, whose spring a serves to move the lever in a inauner to cause it to advance the dra\`vpawl k on its ratchet when it may be necessary so to do` The toothed rack q is p ivotedv to the lower end of the lever 1', and is arranged alongside of the slider o, having the catch-pawl 1) pivoted to it.

This catch-pawl is suspended from or hooks upon ari arm, u, arranged over it, such arm, at its rear end, being pivoted to the frame A, as shown atc. At its front end the arm u is jontedto the lower rod of au oblique rod, w, which, at its upper end, is jointed to the upper arm of the lever that supports the whip-roll.

While the shed is being formed, the .strain on the warps will cause the whip-roller to be drawn forward, and when any such movement of itV takes place, the arm fa will be lowered, and, if depressed far enough, the catch-pawl p will be thrown into engagement with the rack q, in which case the said rack, while heilig `drawn forward by the lever 1', will be caused to draw draw-pawl l.: will be put in action, so as to cause the draw-paw] to tui-n itsratchet, thereby effecting a roy tary :motion of the warp-beam, rra direction for it to let off or deliver warp.

As the shed may.close, the slackening of the warps will ad mitof the falling back of the whip-roller, which, in that case, will lift the arm u, so as to raise the catch-pawl out of engagement with the rack.

lFrom the above it will be seen that I have addedl to the yarn or warp-delivery mechanism, as hei-einbefore explained, and to the whip-roller, supported as de scribed, an auxiliary mechanism, consisting of the arm a andthe rod fw, which, by means of the whip-roller, so controls or governs the action of warp-delivery mechanism as to cause it to deliv'er warps only while the shed is being formed, or while it is complete, the delivery varying as the tension ofthe warp mayrequire.

At any time, when working, the parts become disengaged when 'enoughof yarn or warp is let off to admit of the return of the whip-roll to its normal position. i

Another method of carrying out my invention would be to dispense with the mechanism, hereinbefore del let-off mechanisms jf'or looms.

.a catch-rack, pivoted to the lay or other. proper movable part of the loom, and suspended from the lever or supporting-arm ot' the "whip-roll, the whole being so that, during a retreat of the lay 0r opening of the shed, the catch-rack, provided it he lowered into engagement with the ratchet, shall. revolve such ratchet v so as to eiect instantly a delivery of the warp, the lowering of the ratchet being eiected by the depres-l -sion of the w hi1'J-rollcr, owing,r tothe strain of the warp.

On falling back of the whip-roller, the catch-rack would be elevated 'out of engagement with the ratchet.

-A- mechanism, as last described, is shown in the drawing by dotted lines, the catch or catch-rack being represented at- A', slotted as shown at a', and snp- "ported Vby 'a :stud Vor pin, b', Yextended Vfrom the'lever'oi` the whip-roller. v

There are well-known mechanical equivalents for the whip-roller, many of which are described -in the specitieations of various patents heretofore granted in My invention' is applicable to kmost any one, if not to every one, of such ,let-o'fs or warp-delivery mechanisms, and, therefore, I do not confine it to'a roller alone, as it is equally applicable to a bar, when used in the place oi' the roller, and for a like purpose.

I claim- In combination with the whip-roll andthe mechanism for effecting delivery of the warp, as described, the

catch 11, and its ratehet or rack q, ,the lever 1', connected with the lay, the reciprocating rack q, and the pawl p and slider o, connect-ed with the pawl for ac` tuating the ratchet-wheel, in combination with the whip-roller and its connections,- ior actuating the pawV p, as and forr'the pnl-pose described.

' Y MICAJAkPC.V BURLEIG'H.

Witnesses:

f C. H. DREW, W. D. KNAPP. 

